/*
 * Created on 26 Jun 2006
 * Created by Paul Gardner
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

package com.aelitis.azureus.core.networkmanager.impl.udp;

public class UDPPacket {
    public static final byte PROTOCOL_VERSION = 1;

    public static final byte COMMAND_CRYPTO = 0;
    public static final byte COMMAND_DATA = 1;
    public static final byte COMMAND_ACK = 2;
    public static final byte COMMAND_CLOSE = 3;
    public static final byte COMMAND_STAT_REQUEST = 4;
    public static final byte COMMAND_STAT_REPLY = 5;

    public static final byte FLAG_NONE = 0x00;
    public static final byte FLAG_LAZY_ACK = 0x01;

    private final UDPConnection connection;
    private final int sequence;
    private final int alt_sequence;
    private final byte command;
    private final byte[] buffer;
    private final long unack_in_sequence_count;

    private boolean auto_retransmit = true;
    private short sent_count;
    private short resend_count;
    private boolean received;
    private long send_tick_count;

    protected UDPPacket(UDPConnection _connection, int[] _sequences, byte _command, byte[] _buffer, long _unack_in_sequence_count) {
        connection = _connection;
        sequence = _sequences[1];
        alt_sequence = _sequences[3];
        command = _command;
        buffer = _buffer;

        unack_in_sequence_count = _unack_in_sequence_count;
    }

    protected UDPConnection getConnection() {
        return (connection);
    }

    protected int getSequence() {
        return (sequence);
    }

    protected int getAlternativeSequence() {
        return (alt_sequence);
    }

    protected byte getCommand() {
        return (command);
    }

    protected byte[] getBuffer() {
        return (buffer);
    }

    protected long getUnAckInSequenceCount() {
        return (unack_in_sequence_count);
    }

    protected boolean isAutoRetransmit() {
        return (auto_retransmit);
    }

    protected void setAutoRetransmit(boolean b) {
        auto_retransmit = b;
    }

    protected short sent(long tick_count) {
        sent_count++;

        send_tick_count = tick_count;

        return (sent_count);
    }

    protected short getResendCount() {
        return (resend_count);
    }

    protected void resent() {
        resend_count++;
    }

    protected long getSendTickCount() {
        return (send_tick_count);
    }

    protected void setHasBeenReceived() {
        received = true;
    }

    protected boolean hasBeenReceived() {
        return (received);
    }

    protected int getSentCount() {
        return (sent_count);
    }

    protected String getString() {
        return ("seq=" + sequence + ",type=" + command + ",retrans=" + auto_retransmit + ",sent=" + sent_count + ",len=" + buffer.length);
    }
}
